Run: 2026-02-20-01KHYBB91P9M63K4XSQ0P33NA5

Run Details

Duration:
5.2s
Cost:
$0.000362
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
19.23% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Thick fog enveloped the ancient cobblestone streets as Inspector Hale slowly approached the looming Victorian mansion at midnight. A trembling butler swung open the massive oak door, his pale face illuminated by the flickering gaslight outside. "Inspector, thank God you've come; Sir Reginald lies dead in the library, blood pooling on Persian rugs." Hale nodded grimly and stepped inside, his boots echoing through the shadowed marble-floored grand foyer entrance. Crystal chandeliers cast eerie shadows as he followed the butler down the dimly lit corridor to the crime scene. The library door creaked open, revealing the aristocrat slumped over his mahogany desk, lifeless eyes staring blankly ahead. A single gunshot wound marred his temple, and the air hung heavy with the sharp scent of cordite smoke. Bookshelves towered around the body, their volumes undisturbed except for one fallen volume on the bloodstained floorboards. Hale scanned the room quickly, noting the French windows ajar and rain pattering on the terrace beyond them. Five suspects gathered nervously in the adjoining drawing room, their faces masks of feigned shock and hidden guilt.
created_at"2026-02-20T20:20:04.802Z" 2/20/2026, 8:20:04 PM
model"x-ai/grok-4.1-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency362
moderation_latency(null)
generation_time5107
tokens_prompt46
tokens_completion351
native_tokens_prompt191
native_tokens_completion705
native_tokens_completion_images0
native_tokens_reasoning475
native_tokens_cached190
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.0003622
router(null)
provider_responses
0
endpoint_id"9821aa0e-dce3-4c27-9716-161359123d0b"
id"3c6a275a-62f9-2e9c-5b02-1bbc7ba03209"
is_byokfalse
latency95
model_permaslug"x-ai/grok-4.1-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771618804-rCfENZZCHvwxk2sd0taL"
upstream_id"3c6a275a-62f9-2e9c-5b02-1bbc7ba03209"
total_cost0.0003622
cache_discount0.0000285
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
19.23% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
018
118
217
317
419
518
619
717
818
918